Update parent pom

Switch repos to use HTTPS (@demonwav)
Add destroystokyo public
Add note that screwing with this file sucks
Remove outdated parent

pom.xml

@@ -3,12 +3,7 @@
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
-    <parent>
-        <groupId>org.sonatype.oss</groupId>
-        <artifactId>oss-parent</artifactId>
-        <version>7</version>
-    </parent>
-
+    <!-- Avoid making changes to this file, it has to be deployed manually -->
     <groupId>com.destroystokyo.paper</groupId>
     <artifactId>paper-parent</artifactId>
     <version>dev-SNAPSHOT</version>
@@ -34,11 +29,15 @@
     <repositories>
         <repository>
             <id>md_5-releases</id>
-            <url>http://repo.md-5.net/content/repositories/releases/</url>
+            <url>https://repo.md-5.net/content/repositories/releases/</url>
         </repository>
         <repository>
             <id>aikar</id>
-            <url>http://ci.emc.gs/nexus/content/groups/aikar/</url>
+            <url>https://ci.emc.gs/nexus/content/groups/aikar/</url>
+        </repository>
+        <repository>
+            <id>destroystokyo-repo</id>
+            <url>https://repo.destroystokyo.com/repository/maven-public/</url>
         </repository>
     </repositories>