refactor: Rerevert "Explicitly trim the heap after cache sweeps (#6022)"

Signed-off-by: Pratik Mankawde <3397372+pratikmankawde@users.noreply.github.com>

src/xrpld/app/main/Application.cpp

@@ -41,6 +41,7 @@
 
 #include <xrpl/basics/ByteUtilities.h>
 #include <xrpl/basics/Log.h>
+#include <xrpl/basics/MallocTrim.h>
 #include <xrpl/basics/ResolverAsio.h>
 #include <xrpl/basics/ToString.h>
 #include <xrpl/basics/base_uint.h>
@@ -1088,6 +1089,8 @@ public:
                                    << "; size after: " << cachedSLEs_.size();
         }
 
+        mallocTrim("doSweep", journal_);
+
         // Set timer to do another sweep later.
         setSweepTimer();
     }