FIX: Remove debug message interfering with server capacity calculation

The echo statement to stderr was being captured as the function's
return value when php-optimizer.sh ran: $(calculate_server_memory_capacity 2>&1)

This caused all capacity calculations to fail with 'integer expression expected' errors.

lib/php-analyzer.sh

@@ -917,8 +917,6 @@ convert_to_bytes() {
 # Usage: calculate_server_memory_capacity
 # Returns: total_required_mb|total_ram_mb|percentage|status|details
 calculate_server_memory_capacity() {
-    echo "Analyzing server-wide PHP-FPM memory capacity..." >&2
-
     # Get total system memory
     local total_ram_mb
     total_ram_mb=$(free -m | awk '/^Mem:/ {print $2}')