gnu: flex: Remove superfluous input.

The configure script will warn that "make indent" is unavailable, but
apart from that this input is not actually used for the build process.

* gnu/packages/flex.scm (flex)[inputs]: Remove INDENT.
* gnu/packages/commencement.scm (flex-boot0)[inputs]: Likewise.

gnu/packages/commencement.scm

@@ -33,7 +33,6 @@
   #:use-module (gnu packages c)
   #:use-module (gnu packages gcc)
   #:use-module (gnu packages m4)
-  #:use-module (gnu packages code)
   #:use-module (gnu packages file)
   #:use-module (gnu packages gawk)
   #:use-module (gnu packages bison)
@@ -1742,7 +1741,7 @@ exec " gcc "/bin/" program
   (let* ((flex (package (inherit flex)
                  (native-inputs `(("bison" ,bison-boot0)))
                  (propagated-inputs `(("m4" ,m4)))
-                 (inputs `(("indent" ,indent)))
+                 (inputs '())
                  (arguments '(#:tests? #f)))))
     (package-with-bootstrap-guile
      (package-with-explicit-inputs flex %boot0-inputs

gnu/packages/flex.scm

@@ -27,7 +27,6 @@
   #:use-module (gnu packages m4)
   #:use-module (gnu packages man)
   #:use-module (gnu packages bison)
-  #:use-module (gnu packages code)
   #:use-module (srfi srfi-1))
 
 (define-public flex
@@ -53,8 +52,7 @@
                (substitute-keyword-arguments (package-arguments bison)
                  ((#:tests? _ #f) #f)))
               (inputs (alist-delete "flex" (package-inputs bison))))))
-       `(("bison" ,bison-for-tests)
-         ("indent" ,indent))))
+       `(("bison" ,bison-for-tests))))
     ;; m4 is not present in PATH when cross-building
     (native-inputs
      `(("help2man" ,help2man)