NFC: Remove unused var

Author: hamishknight

lib/AST/Bridging/ExprBridging.cpp

@@ -232,8 +232,6 @@ BridgedUnresolvedSpecializeExpr BridgedUnresolvedSpecializeExpr_createParsed(
     BridgedASTContext cContext, BridgedExpr cSubExpr,
     BridgedSourceLoc cLAngleLoc, BridgedArrayRef cArguments,
     BridgedSourceLoc cRAngleLoc) {
-
-  ASTContext &context = cContext.unbridged();
   return UnresolvedSpecializeExpr::create(
       cContext.unbridged(), cSubExpr.unbridged(), cLAngleLoc.unbridged(),
       cArguments.unbridged<TypeRepr *>(), cRAngleLoc.unbridged());