[rubygems/rubygems] Remove no longer necessary code

https://github.com/rubygems/rubygems/commit/9ea1539b08

lib/bundler/resolver.rb

@@ -80,8 +80,7 @@ module Bundler
     def solve_versions(root:, logger:)
       solver = PubGrub::VersionSolver.new(source: self, root: root, logger: logger)
       result = solver.solve
-      resolved_specs = result.flat_map {|package, version| version.to_specs(package, @most_specific_locked_platform) }
-      resolved_specs |= @base.specs_compatible_with(SpecSet.new(resolved_specs))
+      result.flat_map {|package, version| version.to_specs(package, @most_specific_locked_platform) }
     rescue PubGrub::SolveFailure => e
       incompatibility = e.incompatibility
 

lib/bundler/resolver/base.rb

@@ -30,10 +30,6 @@ module Bundler
         end
       end
 
-      def specs_compatible_with(result)
-        @base.specs_compatible_with(result)
-      end
-
       def [](name)
         @base[name]
       end

lib/bundler/spec_set.rb

@@ -163,12 +163,6 @@ module Bundler
       @specs.detect {|spec| spec.name == name && spec.match_platform(platform) }
     end
 
-    def specs_compatible_with(other)
-      select do |spec|
-        other.valid?(spec)
-      end
-    end
-
     def delete_by_name(name)
       @specs.reject! {|spec| spec.name == name }