minor symfony#16595 Remove tmp addition of zend-stdlib (nicolas-grekas)

This PR was merged into the 2.3 branch.

Discussion
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Remove tmp addition of zend-stdlib

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Reverts symfony#16553

Commits
-------

6e015e7 Remove tmp addition of zend-stdlib

Author: nicolas-grekas

composer.json

@@ -70,7 +70,6 @@
         "monolog/monolog": "~1.3",
         "propel/propel1": "~1.6",
         "ircmaxell/password-compat": "~1.0",
-        "zendframework/zend-stdlib": "~2.2",
         "ocramius/proxy-manager": "~0.3.1"
     },
     "autoload": {

src/Symfony/Bridge/ProxyManager/composer.json

@@ -18,7 +18,6 @@
     "require": {
         "php": ">=5.3.3",
         "symfony/dependency-injection": "~2.3",
-        "zendframework/zend-stdlib": "~2.2",
         "ocramius/proxy-manager": "~0.3.1"
     },
     "require-dev": {