doc: edit text for DEP0101

Make the text slightly more concise. Fix awkward verb tense.

PR-URL: #20519
Reviewed-By: Vse Mozhet Byt <[email protected]>
Reviewed-By: Refael Ackermann <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Trivikram Kamat <[email protected]>

Author: Trott

doc/api/deprecations.md

@@ -926,7 +926,7 @@ This was never a documented feature.
 
 Type: End-of-Life
 
-The `--with-lttng` compile time option is removed.
+The `--with-lttng` compile-time option has been removed.
 
 <a id="DEP0102"></a>
 ### DEP0102: Using `noAssert` in Buffer#(read|write) operations.