fix(installer): fix syntax error

Author: craftslab

build-installer.sh

@@ -55,7 +55,6 @@ else
     echo "ERROR: Only Ubuntu 22.04/24.04 (GLIBC 2.35+) is supported."
     exit 1
 fi
-fi
 
 if command -v node >/dev/null 2>&1; then
     CURRENT_NODE_VERSION=$(node --version | sed 's/v//' | cut -d'.' -f1)