Remove useless gentoo java template

It's always less involved to just modify the ebuild, somehow.

java/template_gentoo

@@ -1,18 +0,0 @@
-# Emerge java-config and eselect-java
-# Copy this file to /usr/share/java-config-2/vm/bootstrap
-# Symlink the java home directory to /usr/lib/jvm/bootstrap
-# Now you can eselect it, and emerge --nodep the final java
-
-VERSION="Bootstrap"
-JAVA_HOME="/usr/lib/jvm/bootstrap"
-JDK_HOME="$JAVA_HOME"
-JAVAC="$JAVA_HOME/bin/javac"
-PATH="$JAVA_HOME/bin"
-ROOTPATH="$PATH"
-LDPATH=""
-MANPATH=""
-PROVIDES_TYPE="JDK JRE"
-PROVIDES_VERSION="11"  # EDIT ME!
-BOOTCLASSPATH=""
-GENERATION="2"
-ENV_VARS="JAVA_HOME JDK_HOME JAVAC PATH ROOTPATH LDPATH MANPATH"