minor #32263 [ErrorCatcher] Remove all deprecated code (fancyweb)

This PR was merged into the 5.0-dev branch.

Discussion
----------

[ErrorCatcher] Remove all deprecated code

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | yes
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | https://github.com/symfony/symfony/pull/32261#discussion_r298641842
| License       | MIT
| Doc PR        | -

Commits
-------

2891d3b506 [ErrorCatcher] Remove all deprecated code

src/Symfony/Component/ErrorCatcher/CHANGELOG.md

@@ -1,6 +1,11 @@
 CHANGELOG
 =========
 
+5.0.0
+-----
+
+ * removed `FlattenException::setTraceFromException()` in favor of `setTraceFromThrowable()`
+
 4.4.0
 -----
 

src/Symfony/Component/ErrorCatcher/ErrorHandler.php

@@ -378,11 +378,6 @@ class ErrorHandler
      */
     public function handleError(int $type, string $message, string $file, int $line): bool
     {
-        // @deprecated to be removed in Symfony 5.0
-        if (\PHP_VERSION_ID >= 70300 && $message && '"' === $message[0] && 0 === strpos($message, '"continue') && preg_match('/^"continue(?: \d++)?" targeting switch is equivalent to "break(?: \d++)?"\. Did you mean to use "continue(?: \d++)?"\?$/', $message)) {
-            $type = E_DEPRECATED;
-        }
-
         // Level is the current error reporting level to manage silent error.
         $level = error_reporting();
         $silenced = 0 === ($level & $type);

src/Symfony/Component/ErrorCatcher/Exception/FlattenException.php

@@ -244,16 +244,6 @@ class FlattenException
         return $this->trace;
     }
 
-    /**
-     * @deprecated since 4.1, use {@see setTraceFromThrowable()} instead.
-     */
-    public function setTraceFromException(\Exception $exception)
-    {
-        @trigger_error(sprintf('The "%s()" method is deprecated since Symfony 4.1, use "setTraceFromThrowable()" instead.', __METHOD__), E_USER_DEPRECATED);
-
-        $this->setTraceFromThrowable($exception);
-    }
-
     public function setTraceFromThrowable(\Throwable $throwable)
     {
         $this->traceAsString = $throwable->getTraceAsString();