Remove print max/min w in microphysics driver (#2040)

TYPE: almost text only

KEYWORDS: extra print, microphysics driver

SOURCE: internal

DESCRIPTION OF CHANGES:
Problem:
PR-1876 accidentally turned on a diagnostic print for max and min vertical motions.

Solution:
The print is removed as in previous code.

LIST OF MODIFIED FILES: 
M       phys/module_microphysics_driver.F

TESTS CONDUCTED: 
The Jenkins tests are all passing.

phys/module_microphysics_driver.F

@@ -806,7 +806,7 @@ SUBROUTINE microphysics_driver( &
  ENDIF
 
 ! set this to true to print out the global max/min for W on each time step.
- IF ( .true. ) THEN
+ IF ( .false. ) THEN
  wmax = maxval( w(ips:ipe,kps:kpe,jps:jpe) )
  wmin = minval( w(ips:ipe,kps:kpe,jps:jpe) )
 #if ( defined(DM_PARALLEL) && ! defined(STUBMPI) )