diff --git a/library/alloc/Cargo.toml b/library/alloc/Cargo.toml
index 017c790ecac34..9ba7c5bd28a11 100644
--- a/library/alloc/Cargo.toml
+++ b/library/alloc/Cargo.toml
@@ -21,9 +21,7 @@ compiler_builtins = { path = "../compiler-builtins/compiler-builtins", features
 [features]
 compiler-builtins-mem = ['compiler_builtins/mem']
 compiler-builtins-c = ["compiler_builtins/c"]
-compiler-builtins-no-asm = ["compiler_builtins/no-asm"]
 compiler-builtins-no-f16-f128 = ["compiler_builtins/no-f16-f128"]
-compiler-builtins-mangled-names = ["compiler_builtins/mangled-names"]
 # Make panics and failed asserts immediately abort without formatting any message
 panic_immediate_abort = ["core/panic_immediate_abort"]
 # Choose algorithms that are optimized for binary size instead of runtime performance
diff --git a/library/std/Cargo.toml b/library/std/Cargo.toml
index ba1e1f5218af7..d77f742e11b6c 100644
--- a/library/std/Cargo.toml
+++ b/library/std/Cargo.toml
@@ -97,9 +97,7 @@ backtrace-trace-only = []
 panic-unwind = ["dep:panic_unwind"]
 compiler-builtins-c = ["alloc/compiler-builtins-c"]
 compiler-builtins-mem = ["alloc/compiler-builtins-mem"]
-compiler-builtins-no-asm = ["alloc/compiler-builtins-no-asm"]
 compiler-builtins-no-f16-f128 = ["alloc/compiler-builtins-no-f16-f128"]
-compiler-builtins-mangled-names = ["alloc/compiler-builtins-mangled-names"]
 llvm-libunwind = ["unwind/llvm-libunwind"]
 system-llvm-libunwind = ["unwind/system-llvm-libunwind"]
 
diff --git a/library/sysroot/Cargo.toml b/library/sysroot/Cargo.toml
index 032f5272a9cd4..82b93682c6105 100644
--- a/library/sysroot/Cargo.toml
+++ b/library/sysroot/Cargo.toml
@@ -23,9 +23,7 @@ backtrace = ["std/backtrace"]
 backtrace-trace-only = ["std/backtrace-trace-only"]
 compiler-builtins-c = ["std/compiler-builtins-c"]
 compiler-builtins-mem = ["std/compiler-builtins-mem"]
-compiler-builtins-no-asm = ["std/compiler-builtins-no-asm"]
 compiler-builtins-no-f16-f128 = ["std/compiler-builtins-no-f16-f128"]
-compiler-builtins-mangled-names = ["std/compiler-builtins-mangled-names"]
 debug_refcell = ["std/debug_refcell"]
 llvm-libunwind = ["std/llvm-libunwind"]
 system-llvm-libunwind = ["std/system-llvm-libunwind"]