[mlir] Fix bazel build after 61d5fdf v2. (llvm#141235)

These files were deleted, and `AllToLLVMIRTranslations` compiles
successfully without them.

Author: bartchr808

utils/bazel/llvm-project-overlay/mlir/BUILD.bazel

@@ -8245,21 +8245,6 @@ cc_library(
     ],
 )
 
-cc_library(
-    name = "AMXToLLVMIRTranslation",
-    srcs = glob(["lib/Target/LLVMIR/Dialect/AMX/*.cpp"]),
-    hdrs = glob(["include/mlir/Target/LLVMIR/Dialect/AMX/*.h"]),
-    includes = ["include"],
-    deps = [
-        ":AMXConversionIncGen",
-        ":AMXDialect",
-        ":IR",
-        ":ToLLVMIRTranslation",
-        "//llvm:Core",
-        "//llvm:Support",
-    ],
-)
-
 cc_library(
     name = "ArmNeonToLLVMIRTranslation",
     srcs = glob(["lib/Target/LLVMIR/Dialect/ArmNeon/*.cpp"]),
@@ -8491,7 +8476,6 @@ cc_library(
     hdrs = ["include/mlir/Target/LLVMIR/Dialect/All.h"],
     includes = ["include"],
     deps = [
-        ":AMXToLLVMIRTranslation",
         ":ArmNeonToLLVMIRTranslation",
         ":ArmSMEToLLVMIRTranslation",
         ":ArmSVEToLLVMIRTranslation",