Get rid of symfony-exceptions.patch (#1815)

* Get rid of symfony-exceptions.patch

We can finally get rid of this since it seems PHP exceptions are finally
deriving from the Exception class rather than the Error class.

* Simply comment out the appropriate Dockerfile lines

This way we can easily re-apply the patch if need be.

Also comment the commented-out lines so it's clear why they exist.

Author: rmunn

docker/app/Dockerfile

@@ -76,9 +76,10 @@ RUN    chown -R www-data:www-data /var/www/html/assets /var/www/html/cache \
 
 COPY --from=composer-builder /composer/vendor /var/www/html/vendor
 
-# patch exception handling from Symfony to actually show exceptions instead of swallowing them
-COPY docker/app/symfony-exceptions.patch /
-RUN patch -p4 -i /symfony-exceptions.patch
+# Uncomment the two lines below if you see Symfony errors like "expected Exception, got Error instead"
+# This will allow you to see the actual underlying error, rather than the Symfony exception that hides the underlying one
+# COPY docker/app/symfony-exceptions.patch /
+# RUN patch -p4 -i /symfony-exceptions.patch
 
 RUN echo "${BUILD_VERSION}" > build-version.txt \
     && sed -i "s/9.9.9/${BUILD_VERSION}/" version.php