remove mention of old instrumenting profiler from docs (#32291)

Author: KristofferC

doc/src/manual/profile.md

@@ -23,8 +23,7 @@ is subject to statistical noise.
 
 Despite these limitations, sampling profilers have substantial strengths:
 
-  * You do not have to make any modifications to your code to take timing measurements (in contrast
-    to the alternative [instrumenting profiler](https://github.com/timholy/IProfile.jl)).
+  * You do not have to make any modifications to your code to take timing measurements.
   * It can profile into Julia's core code and even (optionally) into C and Fortran libraries.
   * By running "infrequently" there is very little performance overhead; while profiling, your code
     can run at nearly native speed.