coverage: Temporarily deactivate -Cinstrument-coverage=branch

Author: Zalathar

compiler/rustc_session/src/session.rs

@@ -355,6 +355,10 @@ impl Session {
     }
 
     pub fn instrument_coverage_branch(&self) -> bool {
+        // Temporarily deactivate `-Cinstrument-coverage=branch`.
+        if true {
+            return false;
+        }
         self.opts.cg.instrument_coverage() == InstrumentCoverage::Branch
     }