io.streams.byte-array: some cleanup.

core/io/streams/byte-array/byte-array-tests.factor

@@ -41,13 +41,13 @@ IN: io.streams.byte-array.tests
     B{ 1 2 3 4 5 6 7 8 9 10 11 12 } binary
     [
         read1
-        0 seek-absolute input-stream get stream-seek
+        0 seek-absolute seek-input
         read1
-        2 seek-relative input-stream get stream-seek
+        2 seek-relative seek-input
         read1
-        -2 seek-end input-stream get stream-seek
+        -2 seek-end seek-input
         read1
-        0 seek-end input-stream get stream-seek
+        0 seek-end seek-input
         read1
     ] with-byte-reader
 ] unit-test