Remove deprecated core plugins from workspace and submodules.

They were all replaced with better alternatives.

.gitmodules

@@ -19,18 +19,12 @@
 [submodule "Mupen64Plus"]
 	path = Mupen64Plus
 	url = git@github.com:OpenEmu/Mupen64Plus-Core.git
-[submodule "NeoPop"]
-	path = NeoPop
-	url = git@github.com:OpenEmu/NeoPop-Core.git
 [submodule "Nestopia"]
 	path = Nestopia
 	url = git@github.com:OpenEmu/Nestopia-Core.git
 [submodule "SNES9x"]
 	path = SNES9x
 	url = git@github.com:OpenEmu/SNES9x-Core.git
-[submodule "VisualBoyAdvance"]
-	path = VisualBoyAdvance
-	url = git@github.com:OpenEmu/VisualBoyAdvance-Core.git
 [submodule "TwoMbit"]
 	path = TwoMbit
 	url = git@github.com:OpenEmu/TwoMbit-Core.git
@@ -46,9 +40,6 @@
 [submodule "PPSSPP"]
 	path = PPSSPP
 	url = git@github.com:OpenEmu/PPSSPP-Core.git
-[submodule "yabause"]
-	path = yabause
-	url = git@github.com:OpenEmu/yabause.git
 [submodule "VecXGL"]
 	path = VecXGL
 	url = git@github.com:OpenEmu/VecXGL-Core.git

OpenEmu.xcworkspace/xcshareddata/xcschemes/Build All + Experimental.xcscheme

@@ -158,34 +158,6 @@
             buildForAnalyzing = "YES">
             <BuildableReference
                BuildableIdentifier = "primary"
-               BlueprintIdentifier = "B56F6FC20F38FC1600DCE88B"
-               BuildableName = "Build &amp; Install NeoPop"
-               BlueprintName = "Build &amp; Install NeoPop"
-               ReferencedContainer = "container:NeoPop/NeoPop.xcodeproj">
-            </BuildableReference>
-         </BuildActionEntry>
-         <BuildActionEntry
-            buildForTesting = "YES"
-            buildForRunning = "YES"
-            buildForProfiling = "YES"
-            buildForArchiving = "YES"
-            buildForAnalyzing = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "82D815AB0F1D882B00EF8CF5"
-               BuildableName = "Build &amp; Install VisualBoyAdvance"
-               BlueprintName = "Build &amp; Install VisualBoyAdvance"
-               ReferencedContainer = "container:VisualBoyAdvance/VisualBoyAdvance.xcodeproj">
-            </BuildableReference>
-         </BuildActionEntry>
-         <BuildActionEntry
-            buildForTesting = "YES"
-            buildForRunning = "YES"
-            buildForProfiling = "YES"
-            buildForArchiving = "YES"
-            buildForAnalyzing = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
                BlueprintIdentifier = "82D815AB0F1D882B00EF8CF5"
                BuildableName = "Build &amp; Install FCEU"
                BlueprintName = "Build &amp; Install FCEU"
@@ -354,20 +326,6 @@
             buildForAnalyzing = "YES">
             <BuildableReference
                BuildableIdentifier = "primary"
-               BlueprintIdentifier = "EB851D141523ABBA00715BD2"
-               BuildableName = "Build &amp; Install Yabause"
-               BlueprintName = "Build &amp; Install Yabause"
-               ReferencedContainer = "container:yabause/yabause/Yabause.xcodeproj">
-            </BuildableReference>
-         </BuildActionEntry>
-         <BuildActionEntry
-            buildForTesting = "YES"
-            buildForRunning = "YES"
-            buildForProfiling = "YES"
-            buildForArchiving = "YES"
-            buildForAnalyzing = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
                BlueprintIdentifier = "FED62A59187BE23C00A88500"
                BuildableName = "Build &amp; Install blueMSX"
                BlueprintName = "Build &amp; Install blueMSX"

OpenEmu.xcworkspace/xcshareddata/xcschemes/Build All.xcscheme

@@ -84,34 +84,6 @@
             buildForAnalyzing = "YES">
             <BuildableReference
                BuildableIdentifier = "primary"
-               BlueprintIdentifier = "B56F6FC20F38FC1600DCE88B"
-               BuildableName = "Build &amp; Install NeoPop"
-               BlueprintName = "Build &amp; Install NeoPop"
-               ReferencedContainer = "container:NeoPop/NeoPop.xcodeproj">
-            </BuildableReference>
-         </BuildActionEntry>
-         <BuildActionEntry
-            buildForTesting = "YES"
-            buildForRunning = "YES"
-            buildForProfiling = "YES"
-            buildForArchiving = "YES"
-            buildForAnalyzing = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "82D815AB0F1D882B00EF8CF5"
-               BuildableName = "Build &amp; Install VisualBoyAdvance"
-               BlueprintName = "Build &amp; Install VisualBoyAdvance"
-               ReferencedContainer = "container:VisualBoyAdvance/VisualBoyAdvance.xcodeproj">
-            </BuildableReference>
-         </BuildActionEntry>
-         <BuildActionEntry
-            buildForTesting = "YES"
-            buildForRunning = "YES"
-            buildForProfiling = "YES"
-            buildForArchiving = "YES"
-            buildForAnalyzing = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
                BlueprintIdentifier = "82D815AB0F1D882B00EF8CF5"
                BuildableName = "Build &amp; Install FCEU"
                BlueprintName = "Build &amp; Install FCEU"