fix: Revert "feat(install.sh): handle installation directory prompt case-insensitively (#7138)

Revert "feat(install.sh): handle installation directory prompt responses case-insensitively (#6866)"

This reverts commit bc48b5fcb0.

install/install.sh

@@ -257,18 +257,12 @@ detect_target() {
   printf '%s' "${target}"
 }
 
-set_interrupt_handler() {
-  trap 'echo; error "Interrupted (please re-run with the '--yes' option)"; exit 130' INT
-}
 
 confirm() {
   if [ -z "${FORCE-}" ]; then
-    set_interrupt_handler
     printf "%s " "${MAGENTA}?${NO_COLOR} $* ${BOLD}[y/N]${NO_COLOR}"
     set +e
     read -r yn </dev/tty
-    trap - INT
-    yn=$(echo "$yn" | tr '[:upper:]' '[:lower:]')
     rc=$?
     set -e
     if [ $rc -ne 0 ]; then
@@ -276,29 +270,8 @@ confirm() {
       exit 1
     fi
     if [ "$yn" != "y" ] && [ "$yn" != "yes" ]; then
-      if [ "$yn" = "n" ] || [ "$yn" = "no" ]; then
-        set_interrupt_handler
-        set +e
-        printf "Where would you like to install Starship? ${GREY}(e.g., /usr/local/bin)${NO_COLOR}\n"
-        read -p "> Install Starship ${GREEN}${VERSION}${NO_COLOR} to: " path
-        trap - INT
-        rc=$?
-        set -e
-        BIN_DIR=$path
-        if [ $rc != 0 ] || [ -z "$path" ]; then
-          if [ -z "$path" ]; then
-            echo
-          fi
-          error "Error reading from prompt (please re-run with '--yes' or provide path)"
-          exit 1
-        fi
-      else
-        if [ -z "$yn" ]; then
-          echo
-        fi
-        error 'Aborting (please answer "yes" to continue)'
-        exit 1
-      fi
+      error 'Aborting (please answer "yes" to continue)'
+      exit 1
     fi
   fi
 }