removed windows and linux split subdir

.tmux/plugins/tpm/bin/install_plugins

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+# Script intended for use via the command line.
+#
+# `.tmux.conf` needs to be set for TPM. Tmux has to be installed on the system,
+# but does not need to be started in order to run this script.
+
+CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+SCRIPTS_DIR="$CURRENT_DIR/../scripts"
+
+main() {
+	"$SCRIPTS_DIR/install_plugins.sh" # has correct exit code
+}
+main