minor #17247 [Config] Remove obsolete warning about INI files (MatTheCat)

This PR was merged into the 4.4 branch.

Discussion
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[Config] Remove obsolete warning about INI files

Spotted thanks to #17232 (comment)

Since symfony/symfony#20232 the claim that “you can only set parameters to string values” is not valid anymore.

Commits
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7a67d8f Remove obsolete warning

Author: wouterj

components/config/resources.rst

@@ -4,13 +4,6 @@
 Loading Resources
 =================
 
-.. caution::
-
-    The ``IniFileLoader`` parses the file contents using the
-    :phpfunction:`parse_ini_file` function. Therefore, you can only set
-    parameters to string values. To set parameters to other data types
-    (e.g. boolean, integer, etc), the other loaders are recommended.
-    
 Loaders populate the application's configuration from different sources
 like YAML files. The Config component defines the interface for such
 loaders. The :doc:`Dependency Injection </components/dependency_injection>`