Historical clue formulations

• Wiped out — 2025-09-04
• Got the lead out? — 2025-02-15
• Took off the board — 2024-07-26
• Took the lead? — 2024-03-16
• Wiped out — 2022-08-28
• Wiped — 2019-12-15
• Rubbed out — 2019-12-06
• Like an amnesiac's memories — 2019-02-16
• Took off the board — 2019-02-10
• Removed from memory — 2018-08-15
• Wiped clean — 2018-05-22
• Removed, as chalk — 2017-05-22
• Deleted — 2016-06-29
• Cleared the blackboard — 2015-11-17
• Blank, now — 2015-05-21
• Like 18 1/2 minutes of the Watergate tapes — 2015-01-05
• Did away with — 2014-08-03
• Cleared — 2012-06-24
• Cleared — 2011-11-03
• Took out — 2011-08-06
• Obliterated — 2010-10-27
• When data's been ___ ... — 2010-03-26
• Now blank — 2009-12-12
• Got rid of marks — 2008-05-13
• Did away with — 2007-09-02
• Rubbed out or off — 2005-08-23
• Gone, now — 2005-07-21
• Cleared — 2004-04-24
• Rubbed out — 2003-10-21
• Clean, now — 2002-10-17
• Cleared the boards — 2002-09-17
• Wiped clean — 1999-05-16
• Eliminated, in a way — 1998-03-25
• Wiped out — 1997-01-11
• Taken out — 1996-09-07
• Cleared the tape — 1996-08-25
• Wiped out — 1996-06-16
• Effaced — 1996-03-08
• Cleaned, as a disk — 1994-11-22
• Gone from the program — 1994-06-27
• Cleared — 1994-05-01
• Canceled — 1994-02-02