Drop unneeded headers (#8433)

I was trying to figure out the dependencies between dialects and these headers created unexpected dependencies between dialects but weren't needed.

Author: jpienaar

include/circt/Dialect/Emit/EmitOps.h

@@ -18,8 +18,6 @@
 #include "mlir/IR/SymbolTable.h"
 
 #include "circt/Dialect/Emit/EmitDialect.h"
-#include "circt/Dialect/Seq/SeqDialect.h"
-#include "circt/Dialect/Seq/SeqTypes.h"
 #include "circt/Support/BuilderUtils.h"
 
 #define GET_OP_CLASSES

lib/Conversion/HWToBTOR2/HWToBTOR2.cpp

@@ -14,7 +14,6 @@
 #include "circt/Dialect/Comb/CombOps.h"
 #include "circt/Dialect/Comb/CombVisitors.h"
 #include "circt/Dialect/HW/HWAttributes.h"
-#include "circt/Dialect/HW/HWModuleGraph.h"
 #include "circt/Dialect/HW/HWOps.h"
 #include "circt/Dialect/HW/HWPasses.h"
 #include "circt/Dialect/HW/HWTypes.h"

lib/Dialect/Emit/EmitDialect.cpp

@@ -12,7 +12,6 @@
 
 #include "circt/Dialect/Emit/EmitDialect.h"
 #include "circt/Dialect/Emit/EmitOps.h"
-#include "circt/Dialect/HW/HWOps.h"
 #include "mlir/IR/Builders.h"
 #include "mlir/IR/BuiltinTypes.h"
 #include "mlir/IR/DialectImplementation.h"

lib/Dialect/Emit/EmitOpInterfaces.cpp

@@ -17,6 +17,5 @@
 
 using namespace mlir;
 using namespace llvm;
-using namespace circt::seq;
 
 #include "circt/Dialect/Emit/EmitOpInterfaces.cpp.inc"

lib/Dialect/HW/HWOps.cpp

@@ -11,7 +11,6 @@
 //===----------------------------------------------------------------------===//
 
 #include "circt/Dialect/HW/HWOps.h"
-#include "circt/Dialect/Comb/CombOps.h"
 #include "circt/Dialect/HW/CustomDirectiveImpl.h"
 #include "circt/Dialect/HW/HWAttributes.h"
 #include "circt/Dialect/HW/HWInstanceImplementation.h"

lib/Dialect/Seq/SeqOps.cpp

@@ -12,7 +12,6 @@
 
 #include "circt/Dialect/Seq/SeqOps.h"
 #include "circt/Dialect/HW/HWOps.h"
-#include "circt/Dialect/Sim/SimTypes.h"
 #include "circt/Support/CustomDirectiveImpl.h"
 #include "circt/Support/FoldUtils.h"
 #include "mlir/Analysis/TopologicalSortUtils.h"

lib/Dialect/Verif/Transforms/VerifyClockedAssertLike.cpp

@@ -10,7 +10,6 @@
 //===----------------------------------------------------------------------===//
 
 #include "circt/Dialect/HW/HWAttributes.h"
-#include "circt/Dialect/HW/HWModuleGraph.h"
 #include "circt/Dialect/HW/HWOps.h"
 #include "circt/Dialect/HW/HWPasses.h"
 #include "circt/Dialect/HW/HWTypes.h"