Altera Quartus II Scripting - Manual (Page 464)

3–334 Chapter 3: Tcl Packages & Commands
sdc_ext
Quartus II Scripting Reference Manual © July 2013 Altera Corporation
remove_clock
Usage
remove_clock [-all] <clock_list>
Options
-all: Removes all clocks from the design
<clock_list>: Clock(s) to be removed
Description
Removes the specified clock(s) from the design.
Example
# Create a clock and then remove it.
create_clock -period 10 -name CLK [get_ports clk]
remove_clock CLK