[TASK] Remove ext_econf.php file

This change removes the ext_emconf.php file,
since this file is not required anymore for classic/non-composer mode, see:
* https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/14.0/Breaking-108310-RequireComposerJsonInClassicMode.html
* https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/14.0/Breaking-108304-PopulateExtensionTitleFromComposerJson.html

Relates: #4519

Author: dkd-kaehm

Docker/SolrServer/.dockerignore

@@ -1,7 +1,6 @@
 .git
 .gitignore
 .idea
-.travis.yml
 Build
 Configuration
 composer.json
@@ -14,16 +13,11 @@ ext_localconf.php
 workflow
 Classes
 README.md
-ext_emconf.php
 ext_tables.php
-Ressources/Css
-Ressources/Images
-Ressources/JavaScript
 Ressources/Private/Install
 Ressources/Private/Language
 Ressources/Private/Layouts
 Ressources/Private/Partials
 Ressources/Private/Php
 Ressources/Private/Templates
 Ressources/Public
-Ressources/Templates

composer.json

@@ -1,7 +1,7 @@
 {
   "name": "apache-solr-for-typo3/solr",
   "type": "typo3-cms-extension",
-  "description": "Apache Solr for TYPO3",
+  "description": "Apache Solr for TYPO3 - Apache Solr for TYPO3 is the enterprise search server you were looking for with special features such as Faceted Search or Synonym Support and incredibly fast response times of results within milliseconds.",
   "license": "GPL-3.0-or-later",
   "keywords": ["typo3", "TYPO3 CMS", "solr", "search"],
   "homepage": "https://www.typo3-solr.com",