gnu: Remove redundant icu4c-69.

* gnu/packages/icu4c.scm (icu4c-69): Remove variable.
* gnu/packages/chromium.scm (ungoogled-chromium)[inputs]: Replace
icu4c-69 with icu4c.

gnu/packages/chromium.scm

@@ -865,7 +865,7 @@
        ("glib" ,glib)
        ("gtk+" ,gtk+)
        ("harfbuzz" ,harfbuzz)
-       ("icu4c" ,icu4c-69)
+       ("icu4c" ,icu4c)
        ("lcms" ,lcms)
        ("libevent" ,libevent)
        ("libffi" ,libffi)

gnu/packages/icu4c.scm

@@ -128,22 +128,6 @@ C/C++ part.")
                (base32
                 "09fng7a80xj8d5r1cgbgq8r47dsw5jsr6si9p2cj2ylhwgg974f7"))))))
 
-(define-public icu4c-69
-  (package
-    (inherit icu4c)
-    (version "69.1")
-    (source (origin
-              (method url-fetch)
-              (uri (string-append
-                    "https://github.com/unicode-org/icu/releases/download/release-"
-                    (string-map (lambda (x) (if (char=? x #\.) #\- x)) version)
-                    "/icu4c-"
-                    (string-map (lambda (x) (if (char=? x #\.) #\_ x)) version)
-                    "-src.tgz"))
-              (sha256
-               (base32
-                "0icps0avkwy5df3wwc5kybxcg63hcgk4phdh9g244g0xrmx7pfjc"))))))
-
 (define-public icu4c-build-root
   (package
     (inherit icu4c)