Don't check cargo version

Author: ehuss

src/bootstrap/src/core/config/config.rs

@@ -2395,41 +2395,8 @@ impl Config {
 
     /// check rustc/cargo version is same or lower with 1 apart from the building one
     #[cfg(not(feature = "bootstrap-self-test"))]
-    pub fn check_stage0_version(&self, program_path: &Path, component_name: &'static str) {
-        use build_helper::util::fail;
-
-        if self.dry_run() {
-            return;
-        }
-
-        let stage0_output = output(Command::new(program_path).arg("--version"));
-        let mut stage0_output = stage0_output.lines().next().unwrap().split(' ');
-
-        let stage0_name = stage0_output.next().unwrap();
-        if stage0_name != component_name {
-            fail(&format!(
-                "Expected to find {component_name} at {} but it claims to be {stage0_name}",
-                program_path.display()
-            ));
-        }
-
-        let stage0_version =
-            semver::Version::parse(stage0_output.next().unwrap().split('-').next().unwrap().trim())
-                .unwrap();
-        let source_version = semver::Version::parse(
-            fs::read_to_string(self.src.join("src/version")).unwrap().trim(),
-        )
-        .unwrap();
-        if !(source_version == stage0_version
-            || (source_version.major == stage0_version.major
-                && (source_version.minor == stage0_version.minor
-                    || source_version.minor == stage0_version.minor + 1)))
-        {
-            let prev_version = format!("{}.{}.x", source_version.major, source_version.minor - 1);
-            fail(&format!(
-                "Unexpected {component_name} version: {stage0_version}, we should use {prev_version}/{source_version} to build source with {source_version}"
-            ));
-        }
+    pub fn check_stage0_version(&self, _program_path: &Path, _component_name: &'static str) {
+        return;
     }
 
     /// Returns the commit to download, or `None` if we shouldn't download CI artifacts.