Remove original tech tree dot file

All information has been transcoded into the issue manager.

tree.dot

@@ -1,52 +0,0 @@
-digraph {
-    wet_lab [label="Wet Lab"]
-    lapping [label="Lapping Machine"]
-    fiber_laser [label="Fiber Laser"]
-    rie [label="Reactive Ion Etching"]
-    plasma [label="Plasma Etching"]
-    
-    wet_lab -> decapping [label="HNO3/H2SO4"]
-    lapping -> decapping
-    fiber_laser -> decapping
-    plasma -> decapping
-    decapping [label="Decapping"]
-
-    delayering [label="Delayering"]
-    fiber_laser -> delayering
-    lapping -> delayering
-    rie -> delayering
-    decapping -> delayering
-    wet_lab -> delayering [label="HNO3/HF"]
-
-    optical_stage [label="Optical Microscope with X/Y motorized stage"]
-
-    laser_fault_injection [label="Laser Fault Injection"]
-    decapping -> laser_fault_injection
-    optical_stage -> laser_fault_injection
-
-    body_bias_injection [label="Body Bias Injection"]
-    decapping -> body_bias_injection
-
-    sem_motorized_stage [label="SEM motorized stage"]
-
-    chip_imaging [label="Simple Chip Imaging"]
-    delayering -> chip_imaging
-    sem_motorized_stage -> chip_imaging
-
-    nanoprobing [label="SEM nanoprobing/live analysis"]
-    sem_motorized_stage -> nanoprobing
-    delayering -> nanoprobing
-
-    sem_fault_injection [label="SEM Fault Injection"]
-    nanoprobing -> sem_fault_injection
-
-    staining [label="DASH Stain"]
-    wet_lab -> staining [label="HNO3/HF"]
-
-    full_chip_re [label="Full Chip RE"]
-    chip_imaging -> full_chip_re
-    staining -> full_chip_re
-
-    microprobing [label="Microprobing"]
-    optical_stage -> microprobing
-}