Hanhan Wang 00767cb452 [mlir] Delete dup code and use unified methods.
The foldMemRefCast method is defined in memref namespace; the
foldTensorCast method is defined in tensor namespace. This revision
deletes the dup code and use the unified methods.

Reviewed By: dcaballe

Differential Revision: https://reviews.llvm.org/D136379
2022-10-21 16:51:44 -07:00
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