Revert "Frameworks/base: Unused parameters in hwui"

This reverts commit 42ddc18d108f789705ad4eb697ce9599ad322507.

Change-Id: I3574a936a39a96314db6437d0a1eb58d260d893d
diff --git a/libs/hwui/ProgramCache.cpp b/libs/hwui/ProgramCache.cpp
index a591150..06353c0 100644
--- a/libs/hwui/ProgramCache.cpp
+++ b/libs/hwui/ProgramCache.cpp
@@ -455,7 +455,7 @@
 // Program generation
 ///////////////////////////////////////////////////////////////////////////////
 
-Program* ProgramCache::generateProgram(const ProgramDescription& description, programid /* key */) {
+Program* ProgramCache::generateProgram(const ProgramDescription& description, programid key) {
     String8 vertexShader = generateVertexShader(description);
     String8 fragmentShader = generateFragmentShader(description);