remove jwt middleware

[stevenwhitehead]

For #2699

Seems consensus is to remove this middleware and rely on the middleware for https://github.com/labstack/echo-jwt .

This PR removes the dependencies and the middleware.

[aldas]

for history sake. This is previous breaking change related to JWT #1946 and discussion about that #1940

[aldas]

Next release v4.13.0 will be Wednesday. This will upset probably quite a few people. At least it is not Friday :)

maybe I should wait till December, after the Black Friday is over.

[aldas]

To link issues/PRs in regards of JWT library (versions v3 v4 and v5) together, since last major change

issues

#2533
#2441
#2323
#2222
#2079

#1941
#1934

pull requests

#2700
#2664
#2590
#2508
#2155
#2122
#1978
#1972