Revert "github-ci: use openssl@1.1"

This reverts commit 33830978.

Follow-up #6477

NO_DOC=ci
NO_TEST=ci
NO_CHANGELOG=ci

.travis.mk

@@ -356,7 +356,7 @@ test_odroid_arm64: deps_odroid_arm64 test_odroid_arm64_no_deps
 # FIXME: Temporary pinned python3 to specific version (i.e. python@3.8) to
 # avoid gevent package installation failure described in gevent/gevent#1721.
 # Revert this back when the issue is resolved.
-OSX_PKGS=openssl@1.1 readline curl icu4c libiconv zlib cmake python@3.8
+OSX_PKGS=openssl readline curl icu4c libiconv zlib cmake python@3.8
 
 deps_osx:
 	# install brew using command from Homebrew repository instructions:

cmake/os.cmake

@@ -132,7 +132,7 @@ elseif (${CMAKE_SYSTEM_NAME} STREQUAL "Darwin")
         endif()
 
         # Detecting OpenSSL
-        execute_process(COMMAND ${HOMEBREW_EXECUTABLE} --prefix openssl@1.1
+        execute_process(COMMAND ${HOMEBREW_EXECUTABLE} --prefix openssl
                         OUTPUT_VARIABLE HOMEBREW_OPENSSL
                         OUTPUT_STRIP_TRAILING_WHITESPACE)
         if (DEFINED HOMEBREW_OPENSSL)