Remove '.hover' from the language on code hover
Remove '.hover' from the language on code hover

What
===
Remove '.hover' from the language name on code hover so language is set
as `java` instead of `java.hover`.

Why
===
The intention of the language is to display it in GitHub's markdown
fenced code block format. The '.hover' is unnecessary noise as only the
'java' is required to correctly satisfy the syntax of the fenced code
block.

georgewfraser/vscode-javac,georgewfraser/vscode-javac,georgewfraser/vscode-javac