got rid of mangaterm handling stdin

.local/bin/mangaterm

@@ -1,6 +1,4 @@
-#!/bin/bash
-
-    set -e
+#!/bin/sh
 
 #using PID for dirname in case multiple instances are opened they do not interfere
 CACHEDIR="$HOME/.cache/mangaterm"
@@ -15,7 +13,7 @@ read_char() {
 }
 
 help() {
-    echo "Read manga/comics in the terminal"
+    echo "Read manga/comics/pdfs in the terminal"
     echo "    mangaterm.sh DIRECTORY"
     echo "    mangaterm.sh FILE"
     echo ""
@@ -98,11 +96,8 @@ handleFile() {
 trap 'close' 2
 trap 'close' 15 
 
-
 [ "$1" = "--help" ] && help
 
-if [ "$#" -gt 0 ]; then
-
 mkdir -p "$TMPDIR"
 
 if [ "$(echo "$1" | cut -c1-1)" = "-" ]; then
@@ -110,41 +105,3 @@ if [ "$#" -gt 0 ]; then
 fi
 
 handleFile "$1"
-else
-
-    LINES=()
-    
-    while IFS= read -r line; do
-        LINES+=("$line")
-    done
-
-    echo "${LINES[0]}"
-    echo "$I"
-
-    LEN="${#LINES[@]}"
-    I=0
-    while read -r -n 1 char < /dev/tty; do
-        if [ "$char" = "j" ]; then
-                I=$((I + 1))
-            elif [ "$char" = "k" ]; then
-                I=$((I - 1))
-            elif [ "$char" = "q" ]; then
-                close
-            fi
-
-        if [ "$I" -ge "$LEN" ] || [ "$I" -le "0" ]; then
-            if [ "$I" -ge "$LEN" ]; then
-                I="$LEN"
-            elif [ "$I" -lt "0" ]; then
-                I=0
-            fi 
-        fi
-
-        echo "${LINES["$I"]}"
-        echo "$I"
-    done
-
-    close
-
-
-fi