[Docs] (ShaderTranspiler, GLState): retire the comments that still describe the lexical side channels

MobileGL/MG_Test/Program/AsyncSpirvPhaseTest.cpp

@@ -877,7 +877,7 @@ TEST_F(AsyncSpirvPhaseTest, AsyncOffAndAsyncOnProduceIdenticalSpirvAndShadow) {
     // The ASYNC arm runs FIRST, deliberately. Both arms must compile the same source text for
     // their SPIR-V to be comparable, and the first arm to run is the one that pays for the
     // cold path: it misses the per-context ShaderPreprocessCache and therefore executes
-    // PreprocessShaderSource, the reserved-identifier scan and both lexical extractions. Run
+    // PreprocessShaderSource and the lexical rejection scans. Run
     // the sync arm first and the async arm becomes a cache hit that never runs any of that on
     // a worker - which is exactly the half this case exists to compare.
     const SingleWorkerScope oneWorker;

MobileGL/MG_Test/Program/ProgramTest.cpp

@@ -3169,9 +3169,9 @@ void main() { fragColor = vec4(pow(uBase, 2.2), 1.0); }
 //   Layer 1 - the same shader object re-sourced with byte-identical text keeps its
 //             compiled state, and glCompileShader on it is a no-op.
 //   Layer 2 - two DIFFERENT shader objects holding byte-identical text share the
-//             source-only half of the pipeline (preprocess + lexical checks +
-//             side-channel extraction) through the context's ShaderPreprocessCache,
-//             while each still gets its own glslang parse.
+//             source-only half of the pipeline (preprocess + the lexical rejection
+//             checks) through the context's ShaderPreprocessCache, while each still
+//             gets its own glslang parse.
 // ---------------------------------------------------------------------------
 namespace {
     const char* kP0bVs = R"(#version 330 core