LinearMediaKitSPI.h is installed as a private SDK header

https://bugs.webkit.org/show_bug.cgi?id=273666
rdar://problem/127468662

Reviewed by Andy Estes.

Partial reland of https://commits.webkit.org/278232@main, SPI module
changes will land as a follow-up.

Remove LinearMediaKitSPI.h from private headers and the WebKitSwift.h
umbrella header, as it is causing TAPI failures. It doesn't need to be
installed to SDK; it's only used from within the WebKit.xcodeproj
targets.

* Source/WebKit/WebKit.xcodeproj/project.pbxproj:
* Source/WebKit/WebKitSwift/WebKitSwift.h:

Canonical link: https://commits.webkit.org/278331@main

Source/WebKit/WebKit.xcodeproj/project.pbxproj

@@ -1953,7 +1953,6 @@
 		A1B4DCE125A7923C007D178C /* MediaSampleByteRange.h in Headers */ = {isa = PBXBuildFile; fileRef = A1B4DCDF25A79211007D178C /* MediaSampleByteRange.h */; };
 		A1C512C9190656E500448914 /* WebPreviewLoaderClient.h in Headers */ = {isa = PBXBuildFile; fileRef = A1C512C7190656E500448914 /* WebPreviewLoaderClient.h */; };
 		A1C9FBFF2BB78C4A00CC6B40 /* LinearMediaKitSPI.h in Headers */ = {isa = PBXBuildFile; fileRef = A1C9FBFE2BB78C4A00CC6B40 /* LinearMediaKitSPI.h */; };
-		A1C9FC002BB78C4A00CC6B40 /* LinearMediaKitSPI.h in Headers */ = {isa = PBXBuildFile; fileRef = A1C9FBFE2BB78C4A00CC6B40 /* LinearMediaKitSPI.h */; settings = {ATTRIBUTES = (Private, ); }; };
 		A1D4D2092B7DE6D00008C40E /* PlaybackSessionInterfaceLMK.mm in Sources */ = {isa = PBXBuildFile; fileRef = 1F6B9EFA2B7AA21B0051676F /* PlaybackSessionInterfaceLMK.mm */; };
 		A1D4D2372B7E7FAD0008C40E /* VideoReceiverEndpointMessage.h in Headers */ = {isa = PBXBuildFile; fileRef = A1D4D2352B7E7FAC0008C40E /* VideoReceiverEndpointMessage.h */; };
 		A1D4D23A2B7E82D90008C40E /* XPCEndpointMessages.h in Headers */ = {isa = PBXBuildFile; fileRef = A1D4D2382B7E82D90008C40E /* XPCEndpointMessages.h */; };
@@ -17565,7 +17564,6 @@
 			buildActionMask = 2147483647;
 			files = (
 				A1098E682BB6410800449EE0 /* LinearMediaKitExtras.h in Headers */,
-				A1C9FC002BB78C4A00CC6B40 /* LinearMediaKitSPI.h in Headers */,
 				A14F9B672B686E0200AD9C56 /* WebKitSwift.h in Headers */,
 				A14F9B762B68CA6C00AD9C56 /* WKSLinearMediaPlayer.h in Headers */,
 				A14F9B632B686DD300AD9C56 /* WKSLinearMediaTypes.h in Headers */,

Source/WebKit/WebKitSwift/WebKitSwift.h

@@ -24,7 +24,6 @@
  */
 
 #import <WebKitSwift/LinearMediaKitExtras.h>
-#import <WebKitSwift/LinearMediaKitSPI.h>
 #import <WebKitSwift/WKSLinearMediaPlayer.h>
 #import <WebKitSwift/WKSLinearMediaTypes.h>
 #import <WebKitSwift/WKSPreviewWindowController.h>