Update LICENSE.TXT to give automated GitHub Match
Update LICENSE.TXT to give automated GitHub Match

* Adjust text of BSD license so that it is now recognised as  BSD-3-Clause license  by GitHub auto-detection.  This includes necessary removal of text [The "BSD 3-clause license"].
* Update copyright year to include current year 2022
* Remove MIT license.  This should be included in THIRD-PARTY-NOTICES.txt.

Signed-off-by: msymons <4db24c2db28eaf2d66d7425da8175c96d16d835f@yahoo.com>
parrt/antlr4,antlr/antlr4,parrt/antlr4,antlr/antlr4,ericvergnaud/antlr4,ericvergnaud/antlr4,ericvergnaud/antlr4,antlr/antlr4,parrt/antlr4,parrt/antlr4,ericvergnaud/antlr4,ericvergnaud/antlr4,ericvergnaud/antlr4,parrt/antlr4,parrt/antlr4,antlr/antlr4,parrt/antlr4,antlr/antlr4,antlr/antlr4,antlr/antlr4,antlr/antlr4,antlr/antlr4,parrt/antlr4,ericvergnaud/antlr4,ericvergnaud/antlr4,ericvergnaud/antlr4,ericvergnaud/antlr4,parrt/antlr4,antlr/antlr4,parrt/antlr4