Update build-presets

- Skip tests
- Remove "-DSWIFT_BUILD_SOURCEKIT:BOOL=TRUE" via swiftlang/swift#7392
- Remove "buildbot_linux_libdispatch"

build-presets-for-sourcekit-linux.ini

@@ -65,39 +65,17 @@ lit-args=-v
 
 skip-test-cmark
 skip-test-lldb
-; skip-test-swift
+skip-test-swift
 skip-test-llbuild
 skip-test-swiftpm
 skip-test-xctest
-; skip-test-foundation
+skip-test-foundation
 skip-test-libdispatch
 
-extra-cmake-options="-DSWIFT_BUILD_SOURCEKIT:BOOL=TRUE,-DSWIFT_TOOL_SOURCEKITD_REPL_BUILD=TRUE"
+extra-cmake-options="-DSWIFT_TOOL_SOURCEKITD_REPL_BUILD=TRUE"
 
 dash-dash
 
 install-foundation
 install-libdispatch
 reconfigure
-
-[preset: buildbot_linux_libdispatch]
-mixin-preset=mixin_lightweight_assertions
-build-subdir=buildbot_linux
-release
-test
-validation-test=0
-libdispatch
-
-skip-test-cmark
-skip-test-lldb
-skip-test-swift
-skip-test-llbuild
-skip-test-swiftpm
-skip-test-xctest
-skip-test-foundation
-; skip-test-libdispatch
-
-dash-dash
-reconfigure
-
-install-destdir=%(install_destdir)s