fix: remove libpcre3-dev from Ubuntu 26.04 build, not available in this release

builder/package.ubuntu-2604

@@ -4,12 +4,8 @@ if [[ ! -d /tmp/output/${OS_IDENTIFIER} ]]; then
   mkdir -p "/tmp/output/${OS_IDENTIFIER}"
 fi
 
-# R 3.x requires PCRE1. On Ubuntu 26, R 3.x also requires PCRE2 for Pango support.
+# PCRE1 (libpcre3-dev) is not available on Ubuntu 26.04, use PCRE2 only.
 pcre_libs='- libpcre2-dev'
-if [[ "${R_VERSION}" =~ ^3 ]]; then
-  pcre_libs='- libpcre2-dev
-- libpcre3-dev'
-fi
 
 deflate_libs='# - libdeflate-dev'
 if grep -q '^LIBS *=.*[-]ldeflate' ${R_INSTALL_PATH}/lib/R/etc/Makeconf; then