PoolBuilder: Drop name constraints loop, already set earlier in same code

src/Composer/DependencyResolver/PoolBuilder.php

@@ -86,18 +86,10 @@ class PoolBuilder
             }
 
             $loadNames[$packageName] = $constraint;
+            // TODO do we even need to set these in name constraints or can we skip them entirely?
             $this->nameConstraints[$packageName] = $constraint ? new MultiConstraint(array($constraint), false) : null;
         }
 
-        // all the merged constraints from install requests + fixed packages can be applied
-        // when loading package metadata already, as these are set in stone
-        foreach ($this->nameConstraints as $package => $constraint) {
-            if ($constraint !== null && array_key_exists($package, $loadNames)) {
-                $loadNames[$package] = $constraint;
-                unset($this->nameConstraints[$package]);
-            }
-        }
-
         // clean up loadNames for anything we manually marked loaded above
         foreach ($loadNames as $name => $void) {
             if (isset($this->loadedNames[$name])) {

tests/Composer/Test/Fixtures/installer/solver-problems.test

@@ -116,8 +116,6 @@ Your requirements could not be resolved to an installable set of packages.
     - Root composer.json requires unstable/package 2.*, found unstable/package[2.0.0-alpha] but it does not match your minimum-stability.
   Problem 3
     - Root composer.json requires non-existent/pkg, it could not be found in any version, there may be a typo in the package name.
-  Problem 4
-    - The requested package dependency/pkg could not be found in any version, there may be a typo in the package name.
   Problem 4
     - Root composer.json requires stable-requiree-excluded/pkg 1.0.1, found stable-requiree-excluded/pkg[1.0.1] but the package is fixed to 1.0.0 (lock file version) by a partial update and that version does not match. Make sure you whitelist it for update.
   Problem 5