removed unused file

top_timing.xdc

-# clock, received via FCLK input from PS7
-# barely used for now
-create_clock -name axi_aclk0 -period 20.000 -waveform {0.000 10.000} [get_nets axi_aclk0]
-
-# external clock 150Mhz
-create_clock -name gtrefclk -period 6.666 -waveform {0.000 3.333} [get_nets sata_top/sata_host/phy/gtrefclk]
-
-# after plls inside of GTX:
-create_clock -name txoutclk -period 6.666 -waveform {0.000 3.333} [get_nets sata_top/sata_host/phy/txoutclk]
-
-# recovered sata parallel clock
-create_clock -name xclk -period 6.666 -waveform {0.000 3.333} [get_nets sata_top/sata_host/phy/gtx_wrap/xclk]
-
-# txoutclk -> userpll, which gives us 2 clocks: userclk (150MHz) and userclk2 (75MHz) . The second one is sata host clk
-###create_generated_clock -name usrclk [get_nets sata_top/sata_host/phy/CLK]
-#create_generated_clock -name sclk   [get_nets sata_top/sata_host/phy/clk]
-###create_generated_clock -name sclk   [get_nets sata_top_n_173]
-
-###These clocks are already automatically extracted
-#create_generated_clock -name usrclk [get_nets sata_top/sata_host/phy/usrclk]
-#create_generated_clock -name usrclk2 [get_nets sata_top/sata_host/phy/usrclk2]
-
-set_clock_groups -name async_clocks -asynchronous \
--group {gtrefclk} \
--group {axi_aclk0} \
--group {xclk} \
--group {usrclk} \
--group {usrclk2} \
--group {clk_axihp_pre} \
--group {txoutclk}
-
-###-group {sclk} \