[MLIR] Remove unnecessary include from MathToEmitC.h to fix build issue

Author: recursion-man

mlir/include/mlir/Conversion/MathToEmitC/MathToEmitC.h

@@ -8,7 +8,6 @@
 
 #ifndef MLIR_CONVERSION_MATHTOEMITC_MATHTOEMITC_H
 #define MLIR_CONVERSION_MATHTOEMITC_MATHTOEMITC_H
-#include "mlir/Dialect/EmitC/IR/EmitC.h"
 namespace mlir {
 class RewritePatternSet;
 namespace emitc {