CI: travis-ci: remove builds migrated to GH actions
diff --git a/.travis.yml b/.travis.yml
index 1057ccc..bb0dfeb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -63,11 +63,6 @@
     env: TARGET=linux-glibc OPENSSL_VERSION=1.1.0l FIFTYONEDEGREES_SRC="contrib/51d/src/trie" CC=clang-9
     name: openssl-1.1.1 | 51d trie
   - os: linux
-    if: type == push
-    compiler: clang
-    env: TARGET=linux-glibc LIBRESSL_VERSION=3.1.1 CC=clang-9
-    name: libressl-3.1.1
-  - os: linux
     env: DEBUG_OPTIONS=""
     if: type == cron
     compiler: clang
@@ -76,21 +71,6 @@
   - os: linux
     if: type == cron
     compiler: clang
-    env: TARGET=linux-glibc LIBRESSL_VERSION=2.9.2 EXTRA_OBJS="contrib/prometheus-exporter/service-prometheus.o" CC=clang-9
-    name: libressl-2.9.2 | prometheus-exporter
-  - os: linux
-    if: type == cron
-    compiler: clang
-    env: TARGET=linux-glibc BORINGSSL=yes
-    name: boringssl
-  - os: linux
-    if: type == push
-    compiler: clang
-    env: TARGET=linux-glibc FLAGS= CC=clang-9
-    name: FLAGS=
-  - os: linux
-    if: type == cron
-    compiler: clang
     env: TARGET=linux-glibc FLAGS="USE_SLZ=1 USE_PCRE2=1 USE_PCRE2_JIT=1 USE_LUA=1 USE_OPENSSL=1 USE_SYSTEMD=1 USE_WURFL=1 WURFL_INC=contrib/wurfl WURFL_LIB=contrib/wurfl USE_51DEGREES=1" CC=clang-9
     before_script:
       - git clone https://github.com/wtarreau/libslz