Remove is_verbose_than function

Author: Kobzol

src/bootstrap/src/core/builder/cargo.rs

@@ -1139,7 +1139,7 @@ impl Builder<'_> {
             cargo.env("RUSTC_BACKTRACE_ON_ICE", "1");
         }
 
-        if self.is_verbose_than(1) {
+        if self.verbosity >= 2 {
             // This provides very useful logs especially when debugging build cache-related stuff.
             cargo.env("CARGO_LOG", "cargo::core::compiler::fingerprint=info");
         }

src/bootstrap/src/lib.rs

@@ -1087,11 +1087,6 @@ impl Build {
         })
     }
 
-    /// Check if verbosity is greater than the `level`
-    pub fn is_verbose_than(&self, level: usize) -> bool {
-        self.verbosity > level
-    }
-
     fn info(&self, msg: &str) {
         match self.config.get_dry_run() {
             DryRun::SelfCheck => (),