crc32: remove `#[cfg(not(target_arch = "arm"))]` from crc functions

They are defined in the aarch64 module, so this cfg is pointless.

Note that these instructions do exist for arm, but the aarch64 ones are
already stable, so this would need some additional work to implement
them for arm.
diff --git a/crates/core_arch/src/aarch64/neon/generated.rs b/crates/core_arch/src/aarch64/neon/generated.rs
index 855261a..ef66149 100644
--- a/crates/core_arch/src/aarch64/neon/generated.rs
+++ b/crates/core_arch/src/aarch64/neon/generated.rs
@@ -16,7 +16,6 @@
 #[doc = "[Arm's documentation](https://developer.arm.com/architectures/instruction-sets/intrinsics/__crc32cd)"]
 #[inline]
 #[target_feature(enable = "crc")]
-#[cfg(not(target_arch = "arm"))]
 #[cfg_attr(test, assert_instr(crc32cx))]
 #[stable(feature = "stdarch_aarch64_crc32", since = "1.80.0")]
 pub fn __crc32cd(crc: u32, data: u64) -> u32 {
@@ -33,7 +32,6 @@
 #[doc = "[Arm's documentation](https://developer.arm.com/architectures/instruction-sets/intrinsics/__crc32d)"]
 #[inline]
 #[target_feature(enable = "crc")]
-#[cfg(not(target_arch = "arm"))]
 #[cfg_attr(test, assert_instr(crc32x))]
 #[stable(feature = "stdarch_aarch64_crc32", since = "1.80.0")]
 pub fn __crc32d(crc: u32, data: u64) -> u32 {
diff --git a/crates/stdarch-gen-arm/spec/neon/aarch64.spec.yml b/crates/stdarch-gen-arm/spec/neon/aarch64.spec.yml
index ccdcea9..770aa58 100644
--- a/crates/stdarch-gen-arm/spec/neon/aarch64.spec.yml
+++ b/crates/stdarch-gen-arm/spec/neon/aarch64.spec.yml
@@ -13,10 +13,6 @@
 neon-stable: &neon-stable
   FnCall: [stable, ['feature = "neon_intrinsics"', 'since = "1.59.0"']]
 
-# #[cfg(not(target_arch = "arm"))]
-target-not-arm: &target-not-arm
-  FnCall: [cfg, [{ FnCall: [not, ['target_arch = "arm"']]}]]
-
 # #[cfg(not(target_arch = "arm64ec"))]
 target-not-arm64ec: &target-not-arm64ec
   FnCall: [cfg, [{ FnCall: [not, ['target_arch = "arm64ec"']]}]]
@@ -13082,7 +13078,6 @@
     return_type: "{type[0]}"
     attr:
       - FnCall: [target_feature, ['enable = "crc"']]
-      - *target-not-arm
       - FnCall: [cfg_attr, [test, { FnCall: [assert_instr, ["crc32x"]] }]]
       - *aarch64-crc-stable
     safety: safe
@@ -13104,7 +13099,6 @@
     return_type: "{type[0]}"
     attr:
       - FnCall: [target_feature, ['enable = "crc"']]
-      - *target-not-arm
       - FnCall: [cfg_attr, [test, { FnCall: [assert_instr, ["crc32cx"]] }]]
       - *aarch64-crc-stable
     safety: safe