Remove Cargo-level feature flags

As recommended in a review, we can probably use the `threads` feature
flag instead for the same kind of conditional compilation.

Author: abrown

Cargo.toml

@@ -493,7 +493,6 @@ coredump = ["wasmtime-cli-flags/coredump"]
 addr2line = ["wasmtime/addr2line"]
 debug-builtins = ["wasmtime/debug-builtins"]
 threads = ["wasmtime-cli-flags/threads"]
-shared-everything-threads = ["wasmtime-cli-flags/shared-everything-threads"]
 gc = ["wasmtime-cli-flags/gc", "wasmtime/gc"]
 gc-drc = ["gc", "wasmtime/gc-drc", "wasmtime-cli-flags/gc-drc"]
 gc-null = ["gc", "wasmtime/gc-null", "wasmtime-cli-flags/gc-null"]

crates/cli-flags/Cargo.toml

@@ -37,6 +37,5 @@ gc = ["wasmtime/gc"]
 gc-drc = ["gc", "wasmtime/gc-drc"]
 gc-null = ["gc", "wasmtime/gc-null"]
 threads = ["wasmtime/threads"]
-shared-everything-threads = ["wasmtime/shared-everything-threads"]
 memory-protection-keys = ["wasmtime/memory-protection-keys"]
 pulley = ["wasmtime/pulley"]

crates/cranelift/Cargo.toml

@@ -46,4 +46,3 @@ gc = ["wasmtime-environ/gc"]
 gc-drc = ["gc", "wasmtime-environ/gc-drc"]
 gc-null = ["gc", "wasmtime-environ/gc-null"]
 threads = ["wasmtime-environ/threads"]
-shared-everything-threads = ["wasmtime-environ/shared-everything-threads"]

crates/environ/Cargo.toml

@@ -70,7 +70,6 @@ compile = [
   "dep:wasmprinter",
 ]
 threads = ['std']
-shared-everything-threads = ['std']
 wmemcheck = ['std']
 std = [
   'anyhow/std',

crates/wasmtime/Cargo.toml

@@ -309,12 +309,6 @@ threads = [
   "std",
 ]
 
-# Enable runtime support for the WebAssembly shared-everything-threads proposal.
-shared-everything-threads = [
-  "wasmtime-cranelift?/shared-everything-threads",
-  "std",
-]
-
 # Controls whether backtraces will attempt to parse DWARF information in
 # WebAssembly modules and components to provide filenames and line numbers in
 # stack traces.