Revert "Always enable MemorySanitizer instrumentation for vertex routines"

This reverts commit 5d795eb63f58a23c06d42caf0a11c977df3f20a2.

Reason for revert: Causes MSan errors in https://chromium-review.googlesource.com/c/chromium/src/+/3621375/

Bug: b/188205704
Change-Id: I71e33330420bc1145379fd668cf6031ca2e644ae
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/65528
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
diff --git a/src/Device/VertexProcessor.cpp b/src/Device/VertexProcessor.cpp
index 89511b1..833fa6a 100644
--- a/src/Device/VertexProcessor.cpp
+++ b/src/Device/VertexProcessor.cpp
@@ -97,8 +97,6 @@
 
 	if(!routine)  // Create one
 	{
-		ScopedPragma msan(MemorySanitizerInstrumentation, true);
-
 		VertexRoutine *generator = new VertexProgram(state, pipelineLayout, vertexShader, descriptorSets);
 		generator->generate();
 		routine = (*generator)("VertexRoutine_%0.8X", state.shaderID);