Revert "[mlir][tosa] Add a pass to narrow i64 to i32 (llvm#165581)"

This reverts commit c61c5d2.

Author: lhutton1

mlir/include/mlir/Dialect/Tosa/Transforms/Passes.td

@@ -166,27 +166,4 @@ def TosaAttachTarget : Pass<"tosa-attach-target", "ModuleOp"> {
   ];
 }
 
-def TosaNarrowI64ToI32Pass : Pass<"tosa-narrow-i64-to-i32", "func::FuncOp"> {
-  let summary = "Narrow I64 TOSA operations to I32";
-  let description = [{
-    This pass narrows TOSA operations with 64-bit integer tensor types to
-    32-bit integer tensor types. This can be useful for backends that do not
-    support the EXT-INT64 extension of TOSA.
-  }];
-
-  let options = [
-    Option<"aggressiveRewrite", "aggressive-rewrite", "bool", "false",
-      "If enabled, all TOSA operations are rewritten, regardless or whether the narrowing"
-      "is safe. This option may lead to data loss if not used carefully.">,
-    Option<"convertFunctionBoundaries", "convert-function-boundaries", "bool", "false",
-      "If enabled, the pass will convert function I/O types as well. Otherwise casts will"
-      "be inserted at the I/O boundaries.">
-  ];
-
-  let dependentDialects = [
-    "func::FuncDialect",
-    "tosa::TosaDialect",
-  ];
-}
-
 #endif // MLIR_DIALECT_TOSA_TRANSFORMS_PASSES

mlir/lib/Dialect/Tosa/Transforms/CMakeLists.txt

@@ -12,7 +12,6 @@ add_mlir_dialect_library(MLIRTosaTransforms
   TosaTypeConverters.cpp
   TosaProfileCompliance.cpp
   TosaValidation.cpp
-  TosaNarrowI64ToI32.cpp
 
   ADDITIONAL_HEADER_DIRS
   ${MLIR_MAIN_INCLUDE_DIR}/mlir/Dialect/Tosa/Transforms