CLDR-21078 Tweaking docs slightly.

tools/cldr/cldr-to-icu/README.txt

diff --git a/tools/cldr/cldr-to-icu/README.txt b/tools/cldr/cldr-to-icu/README.txt
index 18302bc..ec9ce25 100644
--- a/tools/cldr/cldr-to-icu/README.txt
+++ b/tools/cldr/cldr-to-icu/README.txt
@@ -62,8 +62,8 @@
 $ ant -f build-icu-data.xml
 
 
-Other Examples (assuming CLDR_DIR is set)
------------------------------------------
+Other Examples
+--------------
 
 * Outputting a subset of the supplemental data into a specified directory: