Disabling travis

Time to discontinue travis https://arstechnica.com/information-technology/2022/06/credentials-for-thousands-of-open-source-projects-free-for-the-taking-again/

.travis.yml

@@ -1,26 +0,0 @@
----
-language: c++
-dist: xenial
-
-compiler:
-  - clang
-  - gcc
-
-install:
-  - sudo apt-get update || true
-  - sudo apt-get install build-essential
-
-before_script:
-  - git clone https://github.com/ntop/n2n.git; cd n2n; ./autogen.sh; make; cd ..
-  - ./autogen.sh
-
-script:
-  - ./configure
-  - make
-
-notifications:
-  email:
-    recipients:
-      - deri@ntop.org
-    on_success: never
-    on_failure: always