[Sema] Remove unnecessary impact adjustment

Author: Jumhyn

lib/Sema/CSSimplify.cpp

@@ -10060,12 +10060,6 @@ ConstraintSystem::SolutionKind ConstraintSystem::simplifyFixConstraint(
         impact = 10;
     }
 
-    if (locator->isLastElement<LocatorPathElt::UnresolvedMemberChainResult>()) {
-      // If this is a contextual failure for an unresolved member, then increase
-      // the impact to attempt other fixes first and avoid ambiguity.
-      impact = 2;
-    }
-
     if (recordFix(fix, impact))
       return SolutionKind::Error;