remove html coverage generation

build.sh

 #!/bin/sh
-COVERAGE_DIR="coverage/$(basename "$PWD")/${CI_BUILD_REF_NAME}"
 git submodule init 
 git submodule update
-phpunit -c tests/phpunit.xml --coverage-text=coverage.txt --coverage-html="../${COVERAGE_DIR}"
-echo "</pre>"
-echo "<a href='/${COVERAGE_DIR}'>Code coverage</a>"
-echo "<pre>"
+phpunit -c tests/phpunit.xml --coverage-text=coverage.txt
+
 cat coverage.txt