Revert of Turned on SkSL->GLSL compiler

src/sksl/sksl_frag.include

Index: src/sksl/sksl_frag.include
diff --git a/src/sksl/sksl_frag.include b/src/sksl/sksl_frag.include
index 98dbc902522b841f1b02a765a24cd3a5b7671955..123c3393a20c5a3573e8239ab7336cc841cfb29c 100644
--- a/src/sksl/sksl_frag.include
+++ b/src/sksl/sksl_frag.include
@@ -4,17 +4,5 @@
 
 layout(builtin=15) in vec4 gl_FragCoord;
 
-// 9999 is a temporary value that causes us to ignore these declarations beyond
-// adding them to the symbol table. This works fine in GLSL (where they do not
-// require any further handling) but will fail in SPIR-V. We'll have a better
-// solution for this soon.
-layout(builtin=9999) vec4 gl_LastFragData[1];
-layout(builtin=9999) vec4 gl_LastFragColor;
-layout(builtin=9999) vec4 gl_LastFragColorARM;
-layout(builtin=9999) int gl_SampleMaskIn[];
-layout(builtin=9999) out int gl_SampleMask[];
-layout(builtin=9999) vec4 gl_SecondaryFragColorEXT;
+)
 
-layout(location=0,index=0,builtin=10001) out vec4 sk_FragColor;
-
-)